Volume visualization of hidden gallery system of drywood termite using computed tomography: A new approach on monitoring of termite infestation

Abstract

In recent years, X-ray computed tomography (CT) has been developed as a reliable indirect method for insect studies. Here, we introduce the 3D volume visualization of hidden gallery system of drywood termites using computed tomography. Structural timbers infested by the western drywood termite, Incisitermes minor, with various dimensions were subjected into X-ray CT scanning analysis. The tomographic data were reconstructed by direct volume rendering using a volume graphic application. By rendering the tomographic data set, timber properties such as springwood, summerwood, and knots are able to be characterized; and by further specifying the opacity area, the nest-gallery systems inside the timbers are able to be visualized. This technique enables us to understand more biological features of this cryptic termite.